A system and method for the pre-processing of user input events. An input manager configured to interact with text converting components and applications is provided. The input manager receives notification of a user input event, including a code associated with the event. A determination is made whether a text converting component is interested in performing a conversion action with respect to the input event. When a text conversion component is interested in performing a conversion action, the code is obfuscated from the applications. The code may also be obfuscated from the applications when a computer component, such as an input method editor, is interested in processing the input event.